NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 973
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-06-15 | 973-554-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | ROCKAWAY | NJ |
| 2017-06-15 | 973-860-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | BLOOMFIELD | NJ |
| 2016-04-08 | 973-354-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | BELLEVILLE | NJ |
| 2016-04-08 | 973-363-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | HAWTHORNE | NJ |
| 2016-04-08 | 973-369-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | LIVINGSTON | NJ |
| 2016-04-08 | 973-671-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | MILLBURN | NJ |
| 2016-04-07 | 973-295-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | MADISON | NJ |
| 2016-04-07 | 973-601-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | HOPATCONG | NJ |
| 2016-04-07 | 973-833-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | SO ORANGE | NJ |
| 2016-04-07 | 973-888-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | WHIPPANY | NJ |
| 2016-04-07 | 973-938-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | PATERSON | NJ |
| 2016-04-07 | 973-938-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | PATERSON | NJ |
| 2015-02-23 | 973-221-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | HAWTHORNE | NJ |
| 2015-02-23 | 973-369-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | LIVINGSTON | NJ |
| 2015-02-23 | 973-409-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | NEWFOUNDLD | NJ |
| 2015-02-23 | 973-435-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | LITTLE FLS | NJ |
| 2015-02-23 | 973-529-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | NETCONG | NJ |
| 2015-02-23 | 973-788-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | MILLBURN | NJ |
| 2015-02-23 | 973-957-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | ROCKAWAY | NJ |
| 2015-02-23 | 973-969-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | BELLEVILLE | NJ |
| 2013-07-29 | 973-658-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | BOONTON | NJ |
| 2013-03-19 | 973-936-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | MORRISTOWN | NJ |
| 2006-03-06 | 973-780-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | BLOOMFIELD | NJ |
| 2006-03-01 | 973-250-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | BRANCHVL | NJ |
| 2006-01-12 | 973-870-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | PATERSON | NJ |
| 2006-01-11 | 973-272-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | PASSAIC | NJ |
| 2005-12-07 | 973-419-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | ORANGE | NJ |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.